<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    h1 {
      text-align: center;
    }

    div {
      margin: auto;
      width: 1000px;
      height: 600px;
    }

    div img {
      width: 1000px;
      height: 600px;
    }
  </style>
</head>

<body>
  <h1>你已成功登录，欢迎访问</h1>
  <div><img src="/1.webp" alt=""></div>
</body>

</html>